Clamp-bar.



A Hf( rl.v

10.874,725. JPATENTBD 1750.24, 1907.

E. BARKER.

CLAMP BAR.

APPLICATION FILED APR.16,1907.

I l/b? A TTU/e775 ys EUGENE BARKER, OF BATVIA, NEW YORK.

CLAMP-BAR.

specification of Letters Patent.

Patented Dec. 24, 1907.

Application filed April 16. 1907. Serial No. 368.525,

To all whom it may concern.'

Be it known that I, EUGENE BAKKER, a citizen of the United States, residing at Batavia, in the county of Genesee and State of New York, have invented newand useful Clamp-Bars, (Case D,) of which the following is a specification.

This inventlon relates to, bars for gluing clamps and its object is toprovide a device of this character made up-of wood and metal j combined in such a manneras to present all ofthe advantages of a wooden bar with the strains to which metal bars may be subjectedand do not hold the jaws of the clamp as positively as the metal bars. ever, are objectionable because of their weight and cost. The object of the present invention is, as before stated,- to combinetheI advantages of the two forms of bars by forming the body portion of wood and reinforcing the same with ametallic core while the working faces of this bar are similarly reinforced.

With these and other objects in view the,I

invention conslsts of certainv novel features of construction and combinations of parts which will be hereinafter more fully described and pointed out in the claims.

In the accompanying drawings is shown the preferred form of the invention. l

In said drawings: Figure 1 is a perspective view of a portion of abar constructed in 'accordance with the present invention; Fig. 2 is a longitudinal section, therethrough; Fig. 3 is a transverse section through the bar; and Fig. 4 is a longitudinal section through a portion' of a modified form of bar..

Referring to the iigures by'characters of reference, 1 designates a metallic core consisting of a metal stripv disposed to extend throughout the length of the bar and corrugated transversely. Fitting snugl against opposite faces of this core are woo en bars 2 constituting the body of the device and these bars are grooved longitudinally as shown at 3, said grooves registering 4. The core 1 extends to the inner wall of this channel and its op o site edge isflush with those faces of the ars 2 opposite the channel 4.

Metal bars nowing.

to form a channel A back plate 5 preferably formed of sheet. metal extends throughout the length and breadth of the device andV has longitudinal ianges 6 which lap the sides of the bar members 2 andare fastened thereto by means of bolts or rivets 7 which extend transversely through the members 2 and the core 1. EX- tending throughout the length and breadth of the front face of the bar is a plate 8 preferably formed of sheet metal and having longitudinal anges 9' which lap the sides ofthe bar and are secured thereto by bolts or rivets '.10 extending transversely through the members 2 and core 1. A longitudinal series Iof transversely extending corr'ugations 11 is formed along the center of plate 8 and Said corrugations fit snugly within the channel 4 and against the core and constitute a rack 1. These corrugations may be formed either by stamping'the plate 8 or by passing the same between corrugated rollers. y It is of courseto be understood that the corrugations 11 constitute teeth des' ed to be engaged by a jaw of a clamp an as the ressure exerted by the 'aw is directed in thc irection of the widthl o core 1 it is apparent that said core will maintain the bar perfectlr rigid at all times and prevent it from ben This result is obtained particularly in viewof the fact that the core is corrugated in the direction of its width, or the line of ressure thereagainst, and in view` also o the vfact. that th members 2 fit snuglly lwithin the corrugations. Itis apparentt at the plates 5 and 8 take up all the wear resulting1 from the adjustment-and binding action of t e jaw or jaws, and therefor the members 2 merely act as reinforces for the core and constitute backings for the plates 5 and 8.l In view of the fact that ,the two plates-5 and 8 and the coreconstitute the onlyV metal used in theV construction of the bar and ,as these plates and core are comparativel light-it will be understood that the bar wil weigh very little roo more than o ne constructed entirely ofwood.4

However, it can be strengthening the bar it will be seen'that said bar possesses practicallythe same strength as the metal is'plac'ed only Where best used for reinforcing andvk and all the otheradvantagesy of an all-metal bar.

In long bars and bars which are to be subjected to more than the ordinary pressure,

the core can be doubled as lshown 1nl liigzAA by utilizn ltwo oppositely disposed metal strips 12 w 'ch are transversely corrugated.

Various other chan es in the details of construction and in t e arran ements `of the arts can also be made wit out departing om the present invention.

What is claimed is:

. 1. A clamp bar comprising a metallic core, members secured upon opposite faces thereof, and a rack interposed between said members and contacting with one edge of the core.

2. A clamp bar comprising a metallic core, members secured upon opposite faces of the corea back plate secured upon the members and eontactin with one ed e of the core, and a rack secure to said mem ers and contacting with the oppositeledge of the core.

3. A clamp bar comprising a vmetal core, members secured upon opposite faces Athereof, and a plate secured upon said members and having a longitudinal series of transverse corrugations projecting between saidv members.

- secure 4. A clamp bar comprising a transversely corrugated metal core, oppositely disposed members tting snu ly against opposite faces of the core, and pilates embracing and secured upon opposite faces of said members, one of said plates having a longitudinal series of transverse corrugations i 5. A clamp bar comprising a transversely corrugated metal core, members clamped upon o posite faces of said core, and plates upon the members alongopposite stages edges of the core, one of said plates having a longitudinal series o transverse corrugations.

6. A clamp bar comprising ametal core,

' members secured upon opposite faces of the core, and plates secured upon the members and alon opposite edges' of the core.

'7. A c amp bar comprising a transversely -corrugated metal core, members secured upon opposite faces thereof, said.v members having re istering grooves in one face constitutin a c annel, aback plate embracin the 45 mem ers and disposed along one ed e o the core, and a plate embracing the mem ers and having a lon itudinal series of transverse corrugations isposed along the other edge of the core.

8. A clamp bar comprising a metallic core7 members secured upon opposite faces thereof, and a rack secured to the members and contacting with one edge of the core throughout the length thereof.

9. A clamp bar comprising -oppositely disposed corrugated metallic stri s constitut ing a core, and members secure upon opposite faces of the core. X

In testimony that Iclaim the foregoing as 'my own, ll have hereunto affixed my signature in the presence of two witnesses.

EUGENE BARKER. Witnesses:

E. HUME TALBERT, HERBERT D. LAWSON. 

